Zoned baking oven



Oct. 7, 1930. 2 D. H'ULls 1,777,885'

' A zoNEzD4 BAKING ovini Filed Jan. 21, 1928 2 Sheets-Sheetv 2 1,1, nul/11,111,111.

Patented Oct.v7,"1930l i i y l 1,777,885 V`j y i fIioUIs D. HoULIskoF CINCINNATI, omo i ZONED BAKING'` OVEN 1 y y v Y y i `Appliietimalmed'` January 21,1e2eQ-sepiva`1fNa allego@ l 1 y y y `'11m-s invenun relates w'arrzoneibalzing `lr-rurther ebjec'tfrheinvehtiorfieitb pfe-n oyenan'd particularly `to`a.construction' portsent "a {Iieiw 'lue` arrangement yGoinpris'ing` 'a able in character and adapted tobe used in a series of independentlyfcontrolled heating plurality of assembledunits. Zones coinniunicatingiyith fbakingehalnber the ordinarymconstruction of making enclosed thereby and pernittinga regulation 55 ovens the heatingmediuin is common to the ofthe temperature ateach zone andfin all entireare'abf the oven and isgenerally disparts ofjtheoyen. i posed beneathzthe-baking chamber to directly Another object of the inventionis to act thereon. LThis results in `intense heat Vide a plurality ofinwardlyextending ieatf upon lthe chamber jata'point above the burnl `fines terminating centrally l of" .fthe H ovenV in 6o ers, `Wliiln-i the 'remainder of the chamber re-` spaced relation to aV tran'siers'e partition mains natja `loyver temperature which `causes adapted to "supporta baking chamber ineen# unevenbakingfof the contents ofthe oven. tactwith said lues to elfectaheat circulation To'ayoid these objects'proyide a construcbeneath and overtlie top ofthecharnber to an i tion including a plurality of separately conoutletin the ovencasing.v l 65 trolled hejatingzones so arrangedjas to eon- "A till urtherjobject is tolprovide foreftrol the yteniperatureV at different parts of the cient heat circulation by the use oppositeoven', andthe heatingmediumis arranged at `ly disposedcircuitous fineshavingattheirinL i' the inlet'to these zones to avoid vanydirect con- `lets iuid burnersWith air feeding nozzles distactwitli the baking cha1nber.= These iinposed tofdelivei' at the point `of eoinbustion `70 l' "130 sirable to produeetheseoyens as unit sections t proyedfresults are in part l'secured bydispos- 4of the burners. y y y y ngaplufralit `of closed lues at opposite-sides Gtherand liurther` objects and advantages ofthe baseer the oyen -with their outlets adof theinventon Willbehereinafter s etffrth Y jacent the" center thereof "beneath a superand the novel `featurestliereof deliredby ythe posed'baking chamber' to eeetanjoutward `appended clairnsf'` i i n110W ofheat beneath the chamberupward ln theIdraWings- H i over the'lsidesfthereof, andthen over the igure lisa iront elevationfofftwlie iniefri-` i ltop `ofthe chamber to acentrallydisposed tion; 7 l "j ,outlet in the ovenfcasing.' It is' also Very de- ",lflgure 2 isa section Qnln'ejQf-Z of Fig. 3`; y Y igure 3 `:is asimilar View en linel "of 'so l of relatiyelysniall heightwhichcan beassem- FgiZ; 7 l l" A superposed relation and `separately i .`liig".tired4Cifs"a` eetinbnjline controlled to provide fthe' desired ovenca- Figure aftop" planbthjeqburner .with pacityi f raftsbrkn away;

" `f hefh'eating of this type of oven is` greatly "Figure 6 is a "ectirron linel d-jffof '5; facilitated andeconomized by the `use of a I, igureis a lilre View on linefl' lofliig.

special forin Qf burner provided with asecand :Y f M1 i i 1 air :inletimlnjedi'ate'ly adjacent the dureSlisasectionon lij-B "0f ig'. 6. point offeornbustioriby` `which a larger body Ike references refer tojlileparts "in" the 40 of air nayjbe heated maintained at the lse'vera'lfiguies l"offthe drawings y y l sfo "required"temperature` ofthe baking'chaniber L Theoyeneasingliinay belofyanydesired y flbakingchainberjat its upper" portion and pro insulating packing 13. This n casing'hasfthe Y dfi S lOSfWitli inwardly [extending usual'dobr lfl baking fflu'e's fronicppofsite lsides ofthe casing dischamberfl' and theftherniometer 16. Also `,chargingfeentrallybeneathl and around said sight openinlg,4 formed opldositean "chalnber;togetherwith independent heating illuminating device-18, asshovvn lnfFigsb 1 ber by a transverse partition 2l carrying at` its upper portion a supporting shelf 22 for the chamber l5. Each'of the flues or zones is also provided with a horizontal plate 23 extending inwardly from the sides but terminating in spaced relation to the partition 21 toprovide a circuitous passage for the heat. The plates 23 are arranged intermediate the base of the casing and the chamber to form a flue space 24 extending beneath and about the sides of the chamber and also above the same, so that the heat passes over the top thereof and escapes at the central Openings 25 in the inner top wall 26 at each flue space which communicate with a flue 27 discharging into a suitable stack 28 disposed at one side of theoven casing. This provides a fiat closed top wall 29 adapted to support the oven units upon each other when so used, and Yforms a unit readily portable and conveniently assembled'for use.

Each of the independent heat zones is provided with a separate burner, and a very desirable form for cooperation with the zone llues is shown, but not specifically claimed herein. The mixer tube 30 is supported upon the upper wall 3l of an air trunk 32 extending transversely of the flue and having an upwardly directed discharge 33 disposed to project the products of combustion against the horizontal plate 23 within the flue. The tube 30 is formed with an inclined portion 34 and a Vlower section 35 which lie within a seat36 formed inthe air trunk'which seat divides the trunk into parallel inlets 37. At the funnel end 38 of the mixer the fuel `iet 39 is disposed and valve controlled from a feed pipe 41 in the usual manner, to provide for the primary air and fuel mixture. The opposite end of the mixer is formed with the lateral burner head perforated as desired and lying parallel to the secondary air inlet 33 from the trunk.- By such a construction I secure the most elncient cooperation between the structure of zone liues shown and heating means for maintaining the necessary temperature therein and about the baking chamber. Y

The operation of the invention will bev apparent from the foregoing description from which it will be seen that a simple and very efficient oven unit is produced adapted to be easily transported and assembled in super- The flue construction provides for heating the horizontal platev at the inlet portion and thus maintains a uniform temperature in the portion of the flue above said plate. The baking chamber is so disposed relative to the parallel series of flues that all portions ofthe chamber are exposed to the heat and results in the most eicient baking operationand control thereof.

1While the specific construction of both the oven and burner Vhavebeen shown and described the invention is not confined thereto as changes and alterationmay be made therein without departing from the spirit of the invention as recited in the following claims.

'What l claim is il. ln a baking oven, a baking chamber a plurality of independent parallel iiues extending inwardly from opposite sides of the casing and enclosing the bottom and'sides of said chamber, independently controlled fluid burners at the inlets to said lues formed with burner heads and a supplemental air inlet adjacent the point ofcombustion and elongated to extend for substantially the width of the flue.

2. A baking oven unit adapted to be superposed upon a similar unit and including a casing having a flat closed top with an outlet passage therein extending across the center and discharging at one side, a baking chamber in open communication with said top, a series of vertical partitions forming flues extending beneath and about the sides of the chamber, a centrally disposedtransverse partition extending from the bottom of the chamber to the base of the casing and carrying a supporting shelf for the chamber, horizontal partitions vwithin the'flues, extending inward from the sides of the casing and spaced from the transverse partition, and separately controlledV heating burners located at the inlets to each flue and discharging at their ends upwardly into Contact with the horizontal partitions.

3. A baking oven unit adapted to be superposed Vupon asimilar .unit and Vincluding a casing, a baking chamber, a series of vertical partitions forming flues extending beneath and about the sides of the chamber, a centrally disposed transverse partition extending from the bottom of the chamber to the base of the -casing and carrying a supporting shelf for thechamber, horizontal partitions within the flues, extending inward from the sides of the casing and spaced from the transverse partition, and separately controlled heating burners located at the inlets to each flue, said burners having supplemental air inlets discharging adjacent thepoints of combustion, and an outlet due formed in the top of the casing and extending transversely iues extending inwardlyl from opposite sides of said flue withyopenings alined with each of the heating flueswth a discharge at one side of the casing to leave an unobstructed top for the reception ofa superposed unit.

4. In a baking oven, a casing ormed with a baking chamber in its upper portion, a

series of parallel vertical partitions extending from the bottom and ends of the chamber to .the oven walls to form separate alined of the `casing and terminating at the top of said chamber', and independently controlled heating means having y an elongated Vdischarge of substantially the width of the flue and disposed to direct a ame into contact with a wall thereof.

5.V In a baking oven,ia casing formed with n a baking chamber in its upper portion, a

series of parallel vertical partitions extending yfrom the bottom andlends of the chamber to the oven walls to form separate alined n iues` extending inwardly from opposite sidesy of the casing and terminating at the top of said chamber, independently controlled lieatl ing means at the outer end of each flue, a

" independent series at each end of said cham-y centrally disposed outlet flue inthe casing above said chamber extending transversely of. the. alined lues and'` communicating with each thereof, `and a discharge stack at one end of said outlet flue to permit a superposed arrangement of casing units.

`6. A baking oven as defined in claim 15 with a horizontalpartition in each `flue contiguous to the heating means thereof and against the surface of which the discharge from said heatingineans ris directed, said partitionbeing spaced and located to disy charge heated air currents beneath the center ofthe chamber, andmeans at such discharge of heated air currents to divide the lues into ber.

In testimony whereof Iaflix my signature.

y LOUIS l). HOULIS. 

